<!--
 * @Description: 
 * @Author: Zengxs
 * @Date: 2021-10-24 20:42:18
 * @LastEditors: Zengxs
 * @LastEditTime: 2021-10-28 19:10:59
-->
<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogVisible = true"
            >添加角色</el-button
          >
        </el-col>
      </el-row>

      <!-- 角色列表区域-->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag
                  closable
                  @close="removeRightById(scope.row, item1.id)"
                  >{{ item1.authName }}</el-tag
                ><i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二、三级权限 -->
              <el-col :span="19">
                <!-- 通过for 循环 嵌套渲染二级权限 -->
                <el-row
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                      >{{ item2.authName }}</el-tag
                    ><i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="item3 in item1.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                      >{{ item3.authName }}</el-tag
                    >
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <!-- slot-scope="scope" -->
            <el-button
              size="mini"
              type="primary"
              icon="el-icon-edit"
              @click="showEditDialog(scope.row.id)"
              >编辑</el-button
            >
            <el-button
              size="mini"
              type="danger"
              icon="el-icon-delete"
              @click="removeRoleById(scope.row.id)"
              >删除</el-button
            >
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>

      <!-- 添加角色的对话框 -->
      <el-dialog
        title="添加角色"
        :visible.sync="addDialogVisible"
        width="50%"
        @close="addDialogClose"
      >
        <!-- 内容的主体区 -->
        <el-form :model="addForm" label-width="70px" ref="addFormRef">
          <el-form-item label="角色名称" prop="roleName">
            <el-input v-model="addForm.roleName"></el-input>
          </el-form-item>
          <el-form-item label="角色描述" prop="roleDesc">
            <el-input v-model="addForm.roleDesc"></el-input>
          </el-form-item>
        </el-form>
        <!-- 底部区域 -->
        <span slot="footer" class="dialog-footer">
          <el-button @click="addDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="addRole">确 定</el-button>
        </span>
      </el-dialog>

      <!-- 修改角色的对话框 -->
      <el-dialog
        title="修改角色"
        :visible.sync="editDialogVisible"
        width="50%"
        @close="editDialogClosed"
      >
        <el-form :model="editForm" ref="editFormRef" label-width="70px">
          <el-form-item label="角色名称" prop="roleName">
            <el-input v-model="editForm.roleName"></el-input>
          </el-form-item>
          <el-form-item label="角色描述" prop="roleDesc">
            <el-input v-model="editForm.roleDesc"></el-input>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
          <el-button @click="editDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="editRoleInfo">确 定</el-button>
        </span>
      </el-dialog>
    </el-card>

    <!-- 分配权限对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClose"
    >
      <!-- 树形组件 -->
      <el-tree
        :data="rightslist"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>

      <span slot="footer" class="dialog-footer">
        <el-button @click="dialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: 'Roles',
  data() {
    return {
      // 所有角色列表数据
      rolelist: [],
      // 添加角色对话框的显示与隐藏
      addDialogVisible: false,
      // 添加角色的表单数据
      addForm: {
        roleName: '',
        roleDesc: ''
      },
      // 查询到的角色信息对象
      editForm: {},
      // 控制修改角色对话框的显示与隐藏
      editDialogVisible: false,
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      // 所有权限的数据
      rightslist: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的id值数组
      defKeys: [],
      // 当前分配权限的角色id
      roleId: ''
    };
  },
  computed: {},
  created() {
    this.getRolesList();
  },
  mounted() {},
  methods: {
    // 获取所有角色的列表
    async getRolesList() {
      const { data: res } = await this.$http.get('roles');

      if (res.meta.status !== 200) {
        return this.$Message.error('获取角色列表数据失败！');
      }

      this.rolelist = res.data;
      console.log(this.rolelist);
    },

    // 监听用户关闭添加角色对话框
    addDialogClose() {
      this.$refs.addFormRef.resetFields();
    },

    // 监听按钮，添加角色
    async addRole() {
      const { data: res } = await this.$http.post('roles', this.addForm);

      if (res.meta.status !== 201) {
        return this.$Message.error('添加角色失败');
      }

      this.$Message.success('添加角色成功');
      // 隐藏添加角色的对话框
      this.addDialogVisible = false;
      // 重新获取角色列表
      this.getRolesList();
    },

    // 展示修改角色的对话框
    async showEditDialog(id) {
      // console.log(id);
      const { data: res } = await this.$http.get('roles/' + id);
      console.log(res);
      if (res.meta.status !== 200) {
        return this.$Message.error('查询角色信息失败！');
      }
      this.editForm = res.data;
      this.editDialogVisible = true;
    },

    // 监听关闭修改角色对话框
    editDialogClosed() {
      this.$refs.editFormRef.resetFields();
    },

    // 提交修改表单
    async editRoleInfo() {
      // 发起修改用户信息的数据请求
      const { data: res } = await this.$http.put(
        'roles/' + this.editForm.roleId,
        {
          roleName: this.editForm.roleName,
          roleDesc: this.editForm.roleDesc
        }
      );
      console.log(res);
      if (res.meta.status !== 200) {
        return this.$Message.error('更新角色信息失败');
      }

      // 关闭对话框
      this.editDialogVisible = false;

      // 刷新数据列表
      this.getRolesList();

      this.$Message.success('更新角色信息成功');
    },

    // 根据id删除角色
    async removeRoleById(id) {
      // 弹框提示用户是否删除用户信息
      const confirmResult = await this.$confirm(
        '此操作将永久删除该用户, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err);

      // 如果用户确认删除 ，则返回值为字符串 confirm
      //如果用户取消删除 ，则返回值为字符串 cancel
      // console.log(confirmResult);
      if (confirmResult !== 'confirm') {
        return this.$Message.info('已取消删除');
      }

      // 发起删除角色请求
      const { data: res } = await this.$http.delete('roles/' + id);

      if (res.meta.status !== 200) {
        return this.$Message.error('删除角色失败');
      }
      this.$Message.success('删除角色成功');
      this.getRolesList();
    },

    async removeRightById(role, rightId) {
      const confirmResult = await this.$confirm(
        '此操作将永久删除该文件, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err);

      if (confirmResult !== 'confirm') {
        return this.$Message.info('取消了删除');
      }

      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      );

      if (res.meta.status !== 200) {
        return this.$Message.error('删除权限失败！');
      }

      // 这样会刷新页面
      // this.getRolesList();
      // 重新复值权限解决
      role.children = res.data;
    },

    // 展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id;
      // 获取权限数据
      const { data: res } = await this.$http.get('rights/tree');

      if (res.meta.status !== 200) {
        return this.$Message.error('获取权限数据失败！');
      }

      // 把获取到的权限数据保存到data
      this.rightslist = res.data;
      // console.log(res.data);

      // 递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys);

      this.setRightDialogVisible = true;
    },

    // 通过递归的形式 ，获取角色下的所有三级权限的id，并保存到defKeys 数组中
    getLeafKeys(node, arr) {
      // 如果当前node 节点不包含children 属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id);
      }

      node.children.forEach(item => {
        this.getLeafKeys(item, arr);
      });
    },

    // 监听添加权限对话框关闭
    setRightDialogClose() {
      this.defKeys = [];
    },

    // 点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ];

      const idStr = keys.join(',');

      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        {
          rids: idStr
        }
      );

      if (res.meta.status !== 200) {
        return this.$Message.error('分配权限失败！');
      }

      this.$Message.success('分配权限成功');

      this.getRolesList();

      this.setRightDialogVisible = false;
    }
  }
};
</script>
<style lang="less">
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
